<template>
    <div id="app">
        <p>JustifyContent</p>
        <div class="box">
            <div class="grow1"></div>
            <div class="grow2"></div>
            <div class="grow3"></div>
        </div>  
    </div>
</template>
<script>
export default {
    data() {  
    },
    methods:{
    }
}
</script>
<style scoped>
        .grow1{
            height: 100px;
            flex: 1;
            background: coral;
        }
         .grow2{
            height: 100px;
            flex: 2;
            background: cornflowerblue;
        }
         .grow3{
            height: 100px;
            flex: 3;
            background: crimson;
        }
        .box{
            display: flex;
        }
    </style>